I changed the word from knit to craft, because for the most part I'm a crocheter that dabbles in other things. My favorite place to crochet is when I'm crocheting and I'm listening to a book on tape... I love listening to books on tape, it's almost how I would imagine others would sit doing work while listening to the radio. TV requires too much of my visual attention... but I love listening to books on tape. Especially if they're books I need to read for class because then I'm working but not working, if you know what I mean.
As for objects that make my crafting complete, I'd have to say my spoon ring. I wear it on my left ringfinger not because I'm engaged, but because it doesn't fit on any of my other fingers. It's a family piece, and I've found that sometimes if I can't get the right tension on a yarn, threading the yarn through my spoon ring will help.